public class Formula {
    private String left;// 文法左端
    private String[] right;// 文法右端

    public Formula(String left, String[] right) {
        this.left = left;
        this.right = right;
    }

    public String getLeft() {
        return this.left;
    }

    public String[] getRight() {
        return this.right;
    }
}
